Coffee filter



FIG. 1 is a front, left side, top perspective view of a coffee filter with the lid open;

FIG. 2 is a top plan view of the coffee filter fully open;

FIG. 3 is a front, left side top perspective view of the coffee filter with the lid closed;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a left side elevational view thereof;

FIG. 7 is a right side elevational view thereof;

FIG. 8 is a top plan view thereof; and,

FIG. 9 is a bottom plan view thereof.

The broken lines immediately adjacent to the claimed portions are boundaries, all other broken lines are environmental structures; all the broken lines form no part of the claimed design. 

CLAIM The ornamental design for a coffee filter, as shown and described. 